Synthesis of β-hydroxyaspartates and β-hydroxymethylserines from N-Boc-(R)-serinal acetonide derived imines through asymmetric [2+2] cycloaddition reaction.
摘要:
A new approach to beta-alkoxyaspartates using an azetidinone framework as a ch
Synthesis of β-hydroxyaspartates and β-hydroxymethylserines from N-Boc-(R)-serinal acetonide derived imines through asymmetric [2+2] cycloaddition reaction.
摘要:
A new approach to beta-alkoxyaspartates using an azetidinone framework as a ch
Application of (+)-(1S,2S)-2-amino-1-phenylpropan-1,3-diol in the formal total synthesis of carbapenems, novel 4-cyano-β-lactams and β-hydroxy aspartates
作者:Muthusamy Jayaraman、Abdul Rakeep Deshmukh、Baburao M Bhawal
DOI:10.1016/0040-4020(96)00463-2
日期:1996.7
imines derived from (+)-(1S,2S)-2-amino-1-phenylpropan-1,3-diol furnished cis-β-lactams stereoselectively on the Staudinger reaction. These homochiral cis-β-lactams were converted in to cis-β-lactams possessing aminol side chain at C-4. These aminols were efficiently transformed in to novel 4-cyano-cis-β-lactams, 4-acetoxy-β-lactam (which are well proven starting materials in the synthesis of carbapenem
作者:Benito Alcaide、Alberto Rodríguez-Vicente、Miguel A. Sierra
DOI:10.1016/s0040-4039(97)10476-2
日期:1998.1
C4-Unsubstituted beta-lactams 3 are conveniently prepared from easily available 4-formyl-beta-lactams 1, in a sequential three step synthesis, using as the key step a radical reductive decarbonylation of 4-carboxy derivatives through their phenyl selenoesters 2. (C) 1997 Elsevier Science Ltd. All rights reserved.